updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -119,6 +119,7 @@
   * [PermutationAndCombination](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/PermutationAndCombination.js)
   * [PiApproximationMonteCarlo](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/PiApproximationMonteCarlo.js)
   * [Polynomial](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/Polynomial.js)
+  * [Pow](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/Pow.js)
   * [PrimeCheck](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/PrimeCheck.js)
   * [ReversePolishNotation](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/ReversePolishNotation.js)
   * [SieveOfEratosthenes](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/SieveOfEratosthenes.js)
@@ -148,6 +149,7 @@
     * [PerfectSquare](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/PerfectSquare.test.js)
     * [PiApproximationMonteCarlo](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/PiApproximationMonteCarlo.test.js)
     * [Polynomial](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/Polynomial.test.js)
+    * [Pow](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/Pow.test.js)
     * [PrimeCheck](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/PrimeCheck.test.js)
     * [ReversePolishNotation](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/ReversePolishNotation.test.js)
     * [SieveOfEratosthenes](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/SieveOfEratosthenes.test.js)